THEODOLUS INDIANANTA WIDARIONO
041514353019
Supervisor
Prof. Ir. Suparno, MSIE, Ph.D.
ABSTRACT
PT.
Petrokimia Gresik (PKG) which is one of the subsidiaries of PT Pupuk Indonesia which produces fertilizer to support government programs in order to increase agricultural production and national food security is facing high value of raw materials used in the production process. These conditions require PKG to optimize and efficiency of operational activities in producing fertilizer to reduce production costs, where one way is to manage the spare parts inventory effectively and efficiently to support the optimization of maintenance activities. The research methodology is qualitative research with a case study approach to know the phenomenon of spare parts supply that happened in Unit Mek PA I PKG.
Types of data to be taken are primary data derived from observations and interviews with PKG employees and secondary data derived from supporting documents and other references contained in the PKG. The analysis performed is the analysis of characteristics and patterns of spare parts demand in 2016 and 2017 which will then be grouped using ABC classification, then do forecasting to determine the need for spare parts in 2018, then calculated using the EOQ method to get the optimal number of parts orders, safety stock, and reorder point to know the time of reorder. The results obtained are then compared to 2016 and 2017 data available for conclusions about the most efficient spare parts inventory management system. This study concludes that the existing inventory system is quite good but not yet optimal. The management system policy applied is still based on the practices agreed upon by management with reference to experience in previous years. The problem of shortage and stock out in the period of 2016 and 2017 is caused by several factors such as the non-optimal spare parts planning system in the Mechanics Unit of PA I and the relatively long procurement process, especially at the issuance stage of Purchase Requisition (PR). Proposed improvements by the EOQ method may decrease inventory costs (group A in the ABC classification) of Rp. 832,637,792.00 In 2016 and Rp. 1,080,225,148.00 in 2017. This suggests that the EOQ method can provide an average inventory cost savings of 69% per annum and this value can be even greater when taking into account groups B and C.
Keywords: Safety Stock, Reorder Point, Economic Order Quantity, Inventory.
